Improvement in pipe-elbows



irland hm panni effin WILLIAM AUSTIN AND WILLIAM oBDYKE, or PHILADELPHIA,

' PENNSYLVANIA.

Letters Patent No. 113,614, dated April 11, 1871.

AIMPROVEMENT IN PIPE-ELYBCWS.

The Schedule referred to in these Letters Patent and making parl: of the same.

To all whom it may concern:

Be it known that we, WILLIAM AUSTIN and WIL- LIAM OBDYKE, of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain Improvements in Elbows for Sheet-Metal Water-Pipe, of which the following isja specification, reference being had to the accompanying drawing.

Our invention relates to an improved sheet-metal elbow or shoe for water-pipe or spouting; and

The invention consists inthe novel manner of constructing the elbow in a curved form ot'a single sheet of metal cut and bent into shape, as hereinafter described. f

The elbow is intended more especially for corrugated pipe, and in the drawing is shown corrugated for that purpose; but `it`may be made without the corrugations for use on plain or smooth pipe.

Figure l is a view of the sheet-metal plate or blank, with the openings through it, before being bent into form;

Figure 2 is a view of the blank corrugated and partially rolled up;

Figure 3 is a view of the elbow complete; and t Figures 4 and 5 areseetional views of the joints or seams.

In constructing our elbow we rst take a rectangular. sheet of metal, A, as shown in lig. 1, ofthe proper size, and out or punch two or more diamond-shaped openings, B, crosswise through it, as shown. These openings we make of suoli length as to extend nearly the full width of the sheet, and arrange them side by side, as shown.

Atene side of each of these openings B we leave an inwardly-projecting lip, a, and on the opposite side of the opening we cut two small slits, b, so as to leave a tongue, c, between them.; lvlle blank thus prepared we corrngate lengthwise, arid also turn up ali'p along its tw sides, and then fold-it up into the form of a pipe, as shown in tig. 2, and lock or seam the side lips together in Ythe usual manner, as shown in fig. 5. We then bend' the lips a, inward in the form ot' a hook, and the lips c outward in like manner. NVe next bend the pipe until the two edges of eacli opening B come I3. lVe then solder the joints or seams where the edges meet, so as to render them water-tight, and the elbow is complete.

The lips ae, b'y being hooked together, serve to strengthen thefelbow and prevent the joints from opening. -`Instead of beingr hooked togethera rivet may be passed through them, which will answer wthe same purpose.:l 4,

The elbow thus constructed is cheap, strong, and ornamental, and will, owing to its gradual curve, eX- pand like the straight portion of the pipe without bursting. I

Heretofore it has been usual to make the elbow by beveliug oli' the ends of twolp'ieces ot' pipe and soldering them together; but, owing to the abrupt bendY thus formed, the elbow was liable to burst when ice was formed inside; andbesides, the elbow presented a very clumsy and unpleasing appearance. By our present method of construction these difficulties are all overcome. v s

, There may be any desired number of the openings B to produce the required bend in the elbow, the bend depending upon the number and the width 'of the openings. The opening should be quite narrow in width, as any increase in the width produces a cor responding increase in the sharpness of the bend.

The elbow forplaiu or smooth pipe we construct 'in the same manner, except that we do not corrugate the blank.

Having thus described our invention,

What we claim is- An elbow, constructed from a sheet of' metal having a series of pieces cut therefrom te impart to the elbow-When finished the required bend, substantially as described.

WM. AUSTIN. WM. OBDYKE.'

Witnesses:

BENJAMIN I. OBDYKE, GEORGE Hlcks. 

